<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width,initial-scale=1 user-scalable=0">
    <title>aa</title>
  </head>
  <style type="text/css">
  body,html{width: 100%;height: 100%;}
  </style>
  <body>
    <div id="app"></div>
    <!-- built files will be auto injected -->
  </body>
</html>
<script type="text/javascript">
// window.onload=function(){
// 	// console.log(window.screen.width/19.2)
// 	// document.getElementsByTagName('html').
//   var w = document.documentElement.clientWidth || document.body.clientWidth; 
//   console.log(window.screen.width) 
// 	document.getElementsByTagName('html')[0].style.fontSize = (window.screen.width/19.2) + 'px';
// }
</script>